ERPSCAN Research Advisory [ERPSCAN-15-015] SAP NetWeaver AS ABAP–
Hardcoded Credentials
Application: SAP NetWeaver
Versions Affected: SAP NetWeaver AS ABAP, probably others
Vendor URL: http://SAP.com
Bugs: Hardcoded credentials
Sent: 06.03.2014
Reported: 07.03.2014
Vendor response: 07.03.2014
Date of Public Advisory: 15.06.2015
Reference: SAP Security Note 2057982
Author: Rustem Gazizov, Diana Grigorieva (ERPScan)
Description
1. ADVISORY INFORMATION
Title: SAP NetWeaver AS ABAP – Hardcoded Credentials
Advisory ID: [ERPSCAN-15-015]
Risk: High
Advisory URL: http://erpscan.com/advisories/erpscan-15-015-sap-netweaver-hardcoded-credentials/
Date published: 15.06.2015
Vendors contacted: SAP
2. VULNERABILITY INFORMATION
Class: hardcoded credentials [CWE-798]
Impact: read application data; gain privileges / assume identity
Remotely Exploitable: Yes
Locally Exploitable: No
CVSS Information
CVSS Base Score: 2.1 / 10
CVSS Base Vector:
AV : Access Vector (Related exploit range) Network (N)
AC : Access Complexity (Required attack complexity) High (H)
Au : Authentication (Level of authentication needed to exploit) Single (S)
C : Impact to Confidentiality Partial (P)
I : Impact to Integrity None (N)
A : Impact to Availability None (N)
3. VULNERABILITY DESCRIPTION
The program code contains a hardcoded username that changes the
system's behavior if the user is authenticated successfully. The user
may obtain additional information that should not be displayed.
4. VULNERABLE PACKAGES
SAP NetWeaver AS ABAP
Other versions are probably affected too, but they were not checked.
5. SOLUTIONS AND WORKAROUNDS
To correct this vulnerability, install SAP Security Note 2057982
6. AUTHOR
Rustem Gazizov, Diana Grigorieva (ERPScan)
7. TECHNICAL DESCRIPTION
An attacker can use hardcoded credentials to get unauthorized access
and perform various actions in the system. In addition, it is likely
that the code will be implemented into the system as a backdoor.
The vulnerability is in the FKCDBFTRACE ABAP program.
14 APPEND &1.
15 ENDIF.
16 END-OF-DEFINITION.
17
18 DEFINE SWITCH_TRACE_ON.
19 MOVE 'IF SY-UNAME = ''SCHWABK''.' TO MKCD_LINE.
20 APPEND MKCD_LINE TO &1.
21 END-OF-DEFINITION.
22
8. REPORT TIMELINE
Sent: 06.03.2014
Reported: 07.03.2014
Vendor response: 07.03.2014
Date of Public Advisory: 15.06.2015
9. REFERENCES
http://erpscan.com/advisories/erpscan-15-015-sap-netweaver-hardcoded-credentials/
10. ABOUT ERPScan Research
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